[mythtv-users] Why do those mpeg files not play? (capture with a ceton infiniTV 4)

[Ronald Frazier]

> My personal taste would be to not filter anything -- and I suspect multirec
> both requires, and gets, this -- you didn't say if you have multirec
> running on the box that captured those files or not... but as I say,
> depends on what your software requires.

Multirec doesn't require that no filtering to be done...at least not
if you can update the PID filters on the fly. From my work on writing
some code to get my ceton card working in myth, what I've seen of the
HDHR code, it appears that myth tells the HDHR to filter out programs
it isn't interested in, and when a program stops/starts, it appears to
update the filters on the fly. Then myth just splits the rest of the
PIDs up internally for whichever recorder they belong to.

The Ceton doesn't do multirec, as far as I know. It theoretically
would be possible for it to do it when operating in QAM mode without a
cablecard installed (that's what the HDHR Prime will do without a
cablecard), but I don't think it actually does it that way (an
arbitrary design limitation on their part). On the other hand, when a
cablecard is installed, even thought it again could theoretically
support multirec***, according to the guys at Silicon Dust, the
CableLabs specifications prohibit doing so (at least from what I
remember them saying in the SD forums).


*** Well, if the Ceton were to support multirec with a cablecard,
since the cablecard would have to decrypt each program individually,
you'd be limited to how many programs the cablecard could decrypt...I
think the limit is 6 per cable card. However, it would be possible to
do multirec with up to 6 encrypted channels + as many unencrypted QAM
channels as there are on those 4 tuned stations. However, again, the
CableLabs specs prohibit this sort of thing, so it's just theoretical.

-- 
Ron Frazier